mars:
I've already considered the use of frames for that purpose, but as generating the tree on serverside is relativly slow, I think it would be much faster to load a stored file that can be valid as long as we don't change the vfs-tree, also, because it may be necesary to generate that tree several times during a session if the visitor jumps to other pages and it could be necessary to reload the mainpage. But probably I will use this system in lack of other possibilities.
Foggy:
Many thanks for your offer, it would be interesting to see and learn something with your code. I would agree you if you could paste the code in a message, as with the templates i'm working on these days there is no working upload section. Thankyou.